hostapd/main.c

   1 /*
   2  * hostapd / main()
   3  * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #ifndef CONFIG_NATIVE_WINDOWS
  17 #include <syslog.h>
  18 #endif /* CONFIG_NATIVE_WINDOWS */
  19
  20 #include "common.h"
  21 #include "eloop.h"
  22 #include "crypto/tls.h"
  23 #include "common/version.h"
  24 #include "drivers/driver.h"
  25 #include "eap_server/eap.h"
  26 #include "eap_server/tncs.h"
  27 #include "ap/hostapd.h"
  28 #include "ap/config.h"
  29 #include "config_file.h"
  30 #include "eap_register.h"
  31 #include "dump_state.h"
  32 #include "ctrl_iface.h"
  33
  34
  35 extern int wpa_debug_level;
  36 extern int wpa_debug_show_keys;
  37 extern int wpa_debug_timestamp;
  38
  39
  40 struct hapd_interfaces {
  41         size_t count;
  42         struct hostapd_iface **iface;
  43 };
  44
  45
  46 static int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  47                                       int (*cb)(struct hostapd_iface *iface,
  48                                                 void *ctx), void *ctx)
  49 {
  50         size_t i;
  51         int ret;
  52
  53         for (i = 0; i < interfaces->count; i++) {
  54                 ret = cb(interfaces->iface[i], ctx);
  55                 if (ret)
  56                         return ret;
  57         }
  58
  59         return 0;
  60 }
  61
  62
  63 #ifndef CONFIG_NO_HOSTAPD_LOGGER
  64 static void hostapd_logger_cb(void *ctx, const u8 *addr, unsigned int module,
  65                               int level, const char *txt, size_t len)
  66 {
  67         struct hostapd_data *hapd = ctx;
  68         char *format, *module_str;
  69         int maxlen;
  70         int conf_syslog_level, conf_stdout_level;
  71         unsigned int conf_syslog, conf_stdout;
  72
  73         maxlen = len + 100;
  74         format = os_malloc(maxlen);
  75         if (!format)
  76                 return;
  77
  78         if (hapd && hapd->conf) {
  79                 conf_syslog_level = hapd->conf->logger_syslog_level;
  80                 conf_stdout_level = hapd->conf->logger_stdout_level;
  81                 conf_syslog = hapd->conf->logger_syslog;
  82                 conf_stdout = hapd->conf->logger_stdout;
  83         } else {
  84                 conf_syslog_level = conf_stdout_level = 0;
  85                 conf_syslog = conf_stdout = (unsigned int) -1;
  86         }
  87
  88         switch (module) {
  89         case HOSTAPD_MODULE_IEEE80211:
  90                 module_str = "IEEE 802.11";
  91                 break;
  92         case HOSTAPD_MODULE_IEEE8021X:
  93                 module_str = "IEEE 802.1X";
  94                 break;
  95         case HOSTAPD_MODULE_RADIUS:
  96                 module_str = "RADIUS";
  97                 break;
  98         case HOSTAPD_MODULE_WPA:
  99                 module_str = "WPA";
 100                 break;
 101         case HOSTAPD_MODULE_DRIVER:
 102                 module_str = "DRIVER";
 103                 break;
 104         case HOSTAPD_MODULE_IAPP:
 105                 module_str = "IAPP";
 106                 break;
 107         case HOSTAPD_MODULE_MLME:
 108                 module_str = "MLME";
 109                 break;
 110         default:
 111                 module_str = NULL;
 112                 break;
 113         }
 114
 115         if (hapd && hapd->conf && addr)
 116                 os_snprintf(format, maxlen, "%s: STA " MACSTR "%s%s: %s",
 117                             hapd->conf->iface, MAC2STR(addr),
 118                             module_str ? " " : "", module_str, txt);
 119         else if (hapd && hapd->conf)
 120                 os_snprintf(format, maxlen, "%s:%s%s %s",
 121                             hapd->conf->iface, module_str ? " " : "",
 122                             module_str, txt);
 123         else if (addr)
 124                 os_snprintf(format, maxlen, "STA " MACSTR "%s%s: %s",
 125                             MAC2STR(addr), module_str ? " " : "",
 126                             module_str, txt);
 127         else
 128                 os_snprintf(format, maxlen, "%s%s%s",
 129                             module_str, module_str ? ": " : "", txt);
 130
 131         if ((conf_stdout & module) && level >= conf_stdout_level) {
 132                 wpa_debug_print_timestamp();
 133                 printf("%s\n", format);
 134         }
 135
 136 #ifndef CONFIG_NATIVE_WINDOWS
 137         if ((conf_syslog & module) && level >= conf_syslog_level) {
 138                 int priority;
 139                 switch (level) {
 140                 case HOSTAPD_LEVEL_DEBUG_VERBOSE:
 141                 case HOSTAPD_LEVEL_DEBUG:
 142                         priority = LOG_DEBUG;
 143                         break;
 144                 case HOSTAPD_LEVEL_INFO:
 145                         priority = LOG_INFO;
 146                         break;
 147                 case HOSTAPD_LEVEL_NOTICE:
 148                         priority = LOG_NOTICE;
 149                         break;
 150                 case HOSTAPD_LEVEL_WARNING:
 151                         priority = LOG_WARNING;
 152                         break;
 153                 default:
 154                         priority = LOG_INFO;
 155                         break;
 156                 }
 157                 syslog(priority, "%s", format);
 158         }
 159 #endif /* CONFIG_NATIVE_WINDOWS */
 160
 161         os_free(format);
 162 }
 163 #endif /* CONFIG_NO_HOSTAPD_LOGGER */
 164
 165
 166 /**
 167  * hostapd_init - Allocate and initialize per-interface data
 168  * @config_file: Path to the configuration file
 169  * Returns: Pointer to the allocated interface data or %NULL on failure
 170  *
 171  * This function is used to allocate main data structures for per-interface
 172  * data. The allocated data buffer will be freed by calling
 173  * hostapd_cleanup_iface().
 174  */
 175 static struct hostapd_iface * hostapd_init(const char *config_file)
 176 {
 177         struct hostapd_iface *hapd_iface = NULL;
 178         struct hostapd_config *conf = NULL;
 179         struct hostapd_data *hapd;
 180         size_t i;
 181
 182         hapd_iface = os_zalloc(sizeof(*hapd_iface));
 183         if (hapd_iface == NULL)
 184                 goto fail;
 185
 186         hapd_iface->reload_config = hostapd_reload_config;
 187         hapd_iface->config_read_cb = hostapd_config_read;
 188         hapd_iface->config_fname = os_strdup(config_file);
 189         if (hapd_iface->config_fname == NULL)
 190                 goto fail;
 191         hapd_iface->ctrl_iface_init = hostapd_ctrl_iface_init;
 192         hapd_iface->ctrl_iface_deinit = hostapd_ctrl_iface_deinit;
 193         hapd_iface->for_each_interface = hostapd_for_each_interface;
 194
 195         conf = hostapd_config_read(hapd_iface->config_fname);
 196         if (conf == NULL)
 197                 goto fail;
 198         hapd_iface->conf = conf;
 199
 200         hapd_iface->num_bss = conf->num_bss;
 201         hapd_iface->bss = os_zalloc(conf->num_bss *
 202                                     sizeof(struct hostapd_data *));
 203         if (hapd_iface->bss == NULL)
 204                 goto fail;
 205
 206         for (i = 0; i < conf->num_bss; i++) {
 207                 hapd = hapd_iface->bss[i] =
 208                         hostapd_alloc_bss_data(hapd_iface, conf,
 209                                                &conf->bss[i]);
 210                 if (hapd == NULL)
 211                         goto fail;
 212         }
 213
 214         return hapd_iface;
 215
 216 fail:
 217         if (conf)
 218                 hostapd_config_free(conf);
 219         if (hapd_iface) {
 220                 os_free(hapd_iface->config_fname);
 221                 os_free(hapd_iface->bss);
 222                 os_free(hapd_iface);
 223         }
 224         return NULL;
 225 }
 226
 227
 228 static int hostapd_driver_init(struct hostapd_iface *iface)
 229 {
 230         struct wpa_init_params params;
 231         size_t i;
 232         struct hostapd_data *hapd = iface->bss[0];
 233         struct hostapd_bss_config *conf = hapd->conf;
 234         u8 *b = conf->bssid;
 235
 236         if (hapd->driver == NULL || hapd->driver->hapd_init == NULL) {
 237                 wpa_printf(MSG_ERROR, "No hostapd driver wrapper available");
 238                 return -1;
 239         }
 240
 241         /* Initialize the driver interface */
 242         if (!(b[0] | b[1] | b[2] | b[3] | b[4] | b[5]))
 243                 b = NULL;
 244
 245         os_memset(&params, 0, sizeof(params));
 246         params.bssid = b;
 247         params.ifname = hapd->conf->iface;
 248         params.ssid = (const u8 *) hapd->conf->ssid.ssid;
 249         params.ssid_len = hapd->conf->ssid.ssid_len;
 250         params.test_socket = hapd->conf->test_socket;
 251         params.use_pae_group_addr = hapd->conf->use_pae_group_addr;
 252
 253         params.num_bridge = hapd->iface->num_bss;
 254         params.bridge = os_zalloc(hapd->iface->num_bss * sizeof(char *));
 255         if (params.bridge == NULL)
 256                 return -1;
 257         for (i = 0; i < hapd->iface->num_bss; i++) {
 258                 struct hostapd_data *bss = hapd->iface->bss[i];
 259                 if (bss->conf->bridge[0])
 260                         params.bridge[i] = bss->conf->bridge;
 261         }
 262
 263         params.own_addr = hapd->own_addr;
 264
 265         hapd->drv_priv = hapd->driver->hapd_init(hapd, &params);
 266         os_free(params.bridge);
 267         if (hapd->drv_priv == NULL) {
 268                 wpa_printf(MSG_ERROR, "%s driver initialization failed.",
 269                            hapd->driver->name);
 270                 hapd->driver = NULL;
 271                 return -1;
 272         }
 273
 274         return 0;
 275 }
 276
 277
 278 static struct hostapd_iface *
 279 hostapd_interface_init(struct hapd_interfaces *interfaces,
 280                        const char *config_fname, int debug)
 281 {
 282         struct hostapd_iface *iface;
 283         int k;
 284
 285         wpa_printf(MSG_ERROR, "Configuration file: %s", config_fname);
 286         iface = hostapd_init(config_fname);
 287         if (!iface)
 288                 return NULL;
 289         iface->interfaces = interfaces;
 290
 291         for (k = 0; k < debug; k++) {
 292                 if (iface->bss[0]->conf->logger_stdout_level > 0)
 293                         iface->bss[0]->conf->logger_stdout_level--;
 294         }
 295
 296         if (hostapd_driver_init(iface) ||
 297             hostapd_setup_interface(iface)) {
 298                 const struct wpa_driver_ops *driver;
 299                 void *drv_priv;
 300                 driver = iface->bss[0]->driver;
 301                 drv_priv = iface->bss[0]->drv_priv;
 302                 hostapd_interface_deinit(iface);
 303                 if (driver && driver->hapd_deinit)
 304                         driver->hapd_deinit(drv_priv);
 305                 return NULL;
 306         }
 307
 308         return iface;
 309 }
 310
 311
 312 /**
 313  * handle_term - SIGINT and SIGTERM handler to terminate hostapd process
 314  */
 315 static void handle_term(int sig, void *signal_ctx)
 316 {
 317         wpa_printf(MSG_DEBUG, "Signal %d received - terminating", sig);
 318         eloop_terminate();
 319 }
 320
 321
 322 #ifndef CONFIG_NATIVE_WINDOWS
 323
 324 static int handle_reload_iface(struct hostapd_iface *iface, void *ctx)
 325 {
 326         if (hostapd_reload_config(iface) < 0) {
 327                 wpa_printf(MSG_WARNING, "Failed to read new configuration "
 328                            "file - continuing with old.");
 329         }
 330         return 0;
 331 }
 332
 333
 334 /**
 335  * handle_reload - SIGHUP handler to reload configuration
 336  */
 337 static void handle_reload(int sig, void *signal_ctx)
 338 {
 339         struct hapd_interfaces *interfaces = signal_ctx;
 340         wpa_printf(MSG_DEBUG, "Signal %d received - reloading configuration",
 341                    sig);
 342         hostapd_for_each_interface(interfaces, handle_reload_iface, NULL);
 343 }
 344
 345
 346 static void handle_dump_state(int sig, void *signal_ctx)
 347 {
 348 #ifdef HOSTAPD_DUMP_STATE
 349         struct hapd_interfaces *interfaces = signal_ctx;
 350         hostapd_for_each_interface(interfaces, handle_dump_state_iface, NULL);
 351 #endif /* HOSTAPD_DUMP_STATE */
 352 }
 353 #endif /* CONFIG_NATIVE_WINDOWS */
 354
 355
 356 static int hostapd_global_init(struct hapd_interfaces *interfaces)
 357 {
 358         hostapd_logger_register_cb(hostapd_logger_cb);
 359
 360         if (eap_server_register_methods()) {
 361                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
 362                 return -1;
 363         }
 364
 365         if (eloop_init()) {
 366                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
 367                 return -1;
 368         }
 369
 370 #ifndef CONFIG_NATIVE_WINDOWS
 371         eloop_register_signal(SIGHUP, handle_reload, interfaces);
 372         eloop_register_signal(SIGUSR1, handle_dump_state, interfaces);
 373 #endif /* CONFIG_NATIVE_WINDOWS */
 374         eloop_register_signal_terminate(handle_term, interfaces);
 375
 376 #ifndef CONFIG_NATIVE_WINDOWS
 377         openlog("hostapd", 0, LOG_DAEMON);
 378 #endif /* CONFIG_NATIVE_WINDOWS */
 379
 380         return 0;
 381 }
 382
 383
 384 static void hostapd_global_deinit(const char *pid_file)
 385 {
 386 #ifdef EAP_SERVER_TNC
 387         tncs_global_deinit();
 388 #endif /* EAP_SERVER_TNC */
 389
 390         eloop_destroy();
 391
 392 #ifndef CONFIG_NATIVE_WINDOWS
 393         closelog();
 394 #endif /* CONFIG_NATIVE_WINDOWS */
 395
 396         eap_server_unregister_methods();
 397
 398         os_daemonize_terminate(pid_file);
 399 }
 400
 401
 402 static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 403                               const char *pid_file)
 404 {
 405 #ifdef EAP_SERVER_TNC
 406         int tnc = 0;
 407         size_t i, k;
 408
 409         for (i = 0; !tnc && i < ifaces->count; i++) {
 410                 for (k = 0; k < ifaces->iface[i]->num_bss; k++) {
 411                         if (ifaces->iface[i]->bss[0]->conf->tnc) {
 412                                 tnc++;
 413                                 break;
 414                         }
 415                 }
 416         }
 417
 418         if (tnc && tncs_global_init() < 0) {
 419                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 420                 return -1;
 421         }
 422 #endif /* EAP_SERVER_TNC */
 423
 424         if (daemonize && os_daemonize(pid_file)) {
 425                 perror("daemon");
 426                 return -1;
 427         }
 428
 429         eloop_run();
 430
 431         return 0;
 432 }
 433
 434
 435 static void show_version(void)
 436 {
 437         fprintf(stderr,
 438                 "hostapd v" VERSION_STR "\n"
 439                 "User space daemon for IEEE 802.11 AP management,\n"
 440                 "IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator\n"
 441                 "Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> "
 442                 "and contributors\n");
 443 }
 444
 445
 446 static void usage(void)
 447 {
 448         show_version();
 449         fprintf(stderr,
 450                 "\n"
 451                 "usage: hostapd [-hdBKtv] [-P <PID file>] "
 452                 "<configuration file(s)>\n"
 453                 "\n"
 454                 "options:\n"
 455                 "   -h   show this usage\n"
 456                 "   -d   show more debug messages (-dd for even more)\n"
 457                 "   -B   run daemon in the background\n"
 458                 "   -P   PID file\n"
 459                 "   -K   include key data in debug messages\n"
 460                 "   -t   include timestamps in some debug messages\n"
 461                 "   -v   show hostapd version\n");
 462
 463         exit(1);
 464 }
 465
 466
 467 int main(int argc, char *argv[])
 468 {
 469         struct hapd_interfaces interfaces;
 470         int ret = 1;
 471         size_t i;
 472         int c, debug = 0, daemonize = 0;
 473         char *pid_file = NULL;
 474
 475         if (os_program_init())
 476                 return -1;
 477
 478         for (;;) {
 479                 c = getopt(argc, argv, "BdhKP:tv");
 480                 if (c < 0)
 481                         break;
 482                 switch (c) {
 483                 case 'h':
 484                         usage();
 485                         break;
 486                 case 'd':
 487                         debug++;
 488                         if (wpa_debug_level > 0)
 489                                 wpa_debug_level--;
 490                         break;
 491                 case 'B':
 492                         daemonize++;
 493                         break;
 494                 case 'K':
 495                         wpa_debug_show_keys++;
 496                         break;
 497                 case 'P':
 498                         os_free(pid_file);
 499                         pid_file = os_rel2abs_path(optarg);
 500                         break;
 501                 case 't':
 502                         wpa_debug_timestamp++;
 503                         break;
 504                 case 'v':
 505                         show_version();
 506                         exit(1);
 507                         break;
 508
 509                 default:
 510                         usage();
 511                         break;
 512                 }
 513         }
 514
 515         if (optind == argc)
 516                 usage();
 517
 518         interfaces.count = argc - optind;
 519         interfaces.iface = os_malloc(interfaces.count *
 520                                      sizeof(struct hostapd_iface *));
 521         if (interfaces.iface == NULL) {
 522                 wpa_printf(MSG_ERROR, "malloc failed\n");
 523                 return -1;
 524         }
 525
 526         if (hostapd_global_init(&interfaces))
 527                 return -1;
 528
 529         /* Initialize interfaces */
 530         for (i = 0; i < interfaces.count; i++) {
 531                 interfaces.iface[i] = hostapd_interface_init(&interfaces,
 532                                                              argv[optind + i],
 533                                                              debug);
 534                 if (!interfaces.iface[i])
 535                         goto out;
 536         }
 537
 538         if (hostapd_global_run(&interfaces, daemonize, pid_file))
 539                 goto out;
 540
 541         ret = 0;
 542
 543  out:
 544         /* Deinitialize all interfaces */
 545         for (i = 0; i < interfaces.count; i++) {
 546                 struct hostapd_iface *iface = interfaces.iface[i];
 547                 const struct wpa_driver_ops *driver;
 548                 void *drv_priv;
 549                 driver = iface->bss[0]->driver;
 550                 drv_priv = iface->bss[0]->drv_priv;
 551                 hostapd_interface_deinit(iface);
 552                 if (driver && driver->hapd_deinit)
 553                         driver->hapd_deinit(drv_priv);
 554         }
 555         os_free(interfaces.iface);
 556
 557         hostapd_global_deinit(pid_file);
 558         os_free(pid_file);
 559
 560         os_program_deinit();
 561
 562         return ret;
 563 }